本文主要介绍了Python3中PyQt5简单实现文件打开及保存，分享给大家，具体如下：
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file "filemanage.ui"
#
# Created by: PyQt5 UI code generator 5.12.2
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QFileInfo
from PyQt5.QtWidgets import QFileDialog
class Ui_Form(object):
save_path = ""
def setupUi(self, Form):
Form.setObjectName("Form")
Form.resize(484, 412)
self.open_path_text = QtWidgets.QLineEdit(Form)
self.open_path_text.setGeometry(QtCore.QRect(40, 20, 331, 20))
self.open_path_text.setObjectName("open_path_text")
self.open_path_but = QtWidgets.QPushButton(Form)
self.open_path_but.setGeometry(QtCore.QRect(380, 20, 75, 23))
self.open_path_but.setObjectName("open_path_but")
self.save_path_but = QtWidgets.QPushButton(Form)
self.save_path_but.setGeometry(QtCore.QRect(380, 50, 75, 23))
self.save_path_but.setObjectName("save_path_but")
self.save_path_text = QtWidgets.QLineEdit(Form)
self.save_path_text.setGeometry(QtCore.QRect(40, 50, 331, 20))
self.save_path_text.setObjectName("save_path_text")
self.text_value = QtWidgets.QTextEdit(Form)
self.text_value.setGeometry(QtCore.QRect(10, 90, 461, 281))
self.text_value.setObjectName("text_value")
self.save_but = QtWidgets.QPushButton(Form)
self.save_but.setGeometry(QtCore.QRect(190, 380, 75, 23))
self.save_but.setObjectName("save_but")
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
Form.setWindowTitle(_translate("Form", "Form"))
self.open_path_text.setPlaceholderText(_translate("Form", "打开地址"))
self.open_path_but.setText(_translate("Form", "浏览"))
self.save_path_but.setText(_translate("Form", "浏览"))
self.save_path_text.setPlaceholderText(_translate("Form", "保存地址"))
self.save_but.setText(_translate("Form", "保存"))
self.open_path_but.clicked.connect(self.open_event)
self.save_path_but.clicked.connect(self.save_event)
self.save_but.clicked.connect(self.save_text)
def open_event(self):
_translate = QtCore.QCoreApplication.translate
directory1 = QFileDialog.getOpenFileName(None, "选择文件", "H:/")
print(directory1) # 打印文件夹路径
path = directory1[0]
self.open_path_text.setText(_translate("Form", path))
if path is not None:
with open(file=path, mode="r+", encoding="utf-8") as file:
self.text_value.setPlainText(file.read())
def save_event(self):
global save_path
_translate = QtCore.QCoreApplication.translate
fileName2, ok2 = QFileDialog.getSaveFileName(None, "文件保存", "H:/")
print(fileName2) # 打印保存文件的全部路径（包括文件名和后缀名）
save_path = fileName2
self.save_path_text.setText(_translate("Form", save_path))
def save_text(self):
global save_path
if save_path is not None:
with open(file=save_path, mode="a+", encoding="utf-8") as file:
file.write(self.text_value.toPlainText())
print("已保存！")
self.text_value.clear()
"""
directory1 = QFileDialog.getExistingDirectory(self, "选择文件夹", "/")
print(directory1) # 打印文件夹路径
text.setText(_translate("Form", directory1))
fileName, filetype = QFileDialog.getOpenFileName(self, "选择文件", "/", "All Files (*);;Text Files (*.txt)")
print(fileName, filetype) # 打印文件全部路径（包括文件名和后缀名）和文件类型
print(fileName) # 打印文件全部路径（包括文件名和后缀名）
text.setText(_translate("Form", fileName))
fileinfo = QFileInfo(fileName)
print(fileinfo) # 打印与系统相关的文件信息，包括文件的名字和在文件系统中位置，文件的访问权限，是否是目录或符合链接，等等。
file_name = fileinfo.fileName()
print(file_name) # 打印文件名和后缀名
file_suffix = fileinfo.suffix()
print(file_suffix) # 打印文件后缀名
file_path = fileinfo.absolutePath()
print(file_path) # 打印文件绝对路径（不包括文件名和后缀名）
files, ok1 = QFileDialog.getOpenFileNames(self, "多文件选择", "/", "所有文件 (*);;文本文件 (*.txt)")
print(files, ok1) # 打印所选文件全部路径（包括文件名和后缀名）和文件类型
fileName2, ok2 = QFileDialog.getSaveFileName(self, "文件保存", "/", "图片文件 (*.png);;(*.jpeg)")
print(fileName2) # 打印保存文件的全部路径（包括文件名和后缀名）
"""
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
widget = QtWidgets.QWidget()
ui = Ui_Form()
ui.setupUi(widget)
widget.show()
sys.exit(app.exec_())
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原文链接：https://blog.csdn.net/u013032852/article/details/93996214